2.2.4.Є Enzymatic Extraction

The enzymatic process uses select enzymes to degrade algae cell walls and in the process system water acts as a solvent medium for enzyme action. No additional solvent is involved, therefore this process facilitates an easier downstream fractionation. The advantages of the enzymatic extraction pro­cess include:

(a) The process does not require dry cakes for oil extraction.

(b) No caustic chemicals are required or involved.

(c) Mild process conditions are used.

(d) The process can be synergistically integrated with other processes such as ultrasonification.

(e) Environmental impact is minimal.

The process is also in a beginning stage and finding efficient and robust enzymes for the process is a challenge. Unless a cost-effective enzyme is developed and proven for the process, this process would be more expen­sive costwise than hexane solvent extraction. However, there are ample opportunities with this approach, inasmuch as the process can be utilized in conjunction with many other mechanical extraction technologies. In addi­tion, a drastically different product portfolio may be developed for highly value-added coproducts and by-products.